正常国人骨盆易损部位（或危险点）应力应变分布的实验研究

报道了模拟正常国人双肢站立位，骨盆在承受体重（３００牛顿６００牛顿和９００牛顿静载荷）时，用应变电测法得到的应力、应变分布、以及各测点的实测线应变，并计算出骨 不同载荷下各测点的最大最小应变值。数据通过电子计算机处理，得出主应力σ１、σ２和主应力方向角度。

Experimental Study of Distribution of Stress and Strain on Pelvis in Normal Chinese Adult

To approach the biomechanical properties of pelvis in normal Chinese adult, an intact pelvis taken from fresh healthy male cadaver after sudden death was used in this study. The pelvis joined up with lumber4, 5 and proximal segment of femurs. After appropriate management of the specimen, the loads in the simulated test (stand position of normal adult) are 300 N, 600 N and 900 N. With strain electric measuring apparatus, the distribution of stress and strain, and the actual linear strain of every measuring point are obtained. Data processing was performed on computer. The main stress sigma 1, sigma 2 and their direction angles were acquired. The results of the simulated test demonstrated that the stress of iliac bone adjacent to sacro-iliac articulation was maximum in all measuring points. The linear strain values of 0 degree direction parallel with coronal section were negative in majority, but those of 45 degrees and 90 degrees direction vertical with coronal section were positive in majority. So the distribution of the linear strain of pelvis should be very complicated. When 900 N weight acted on the pelvis, the maximum main stress sigma max = 0.269-20.01 MPa and the minimum main stress sigma min = -0.095(-)-16.56 MPa. The angle of the maximum main stress with coronal section did not exceed 4 degrees.